Coking-oven.



No. 659,046.` Patented Oct. 2, |900. C. G. ATWATER'.

^ COKING' OVEN.

y (Appication led Nov. 7, 1899.)

(No Model.)

E1/Locutor,

lmnllllln QW @W NITED STATES PATENT firmen.

CHRISTOPHER G. ATWATER, OF BOSTON, MASSACHUSETTS.

COKING- OVEN.

SPECIFICATION forming part of Letters Patent No. 659,046, dated October2, 1900. Application filed November '7, 1899. Serial No. 736,168. (Nomodel.)

To all whom t may concern,.-

Beit known that I, CHRISTOPHER G. AT- WA'IER, a citizen of the UnitedStates, residing in the city of Boston, in the county of Suffolk andState of Massach usetts, have invented a certain new and usefulImprovement in Coking-Ovens,ofwhich thefollowingisaspecification.

My present invention has especial relation to coking-ovens heated bygas; and the principal object of my invention is the production of aform of oven wherein the coking shall be complete and uniform and onewherein the gaseous fuel is utilized to the best advantage.

In the accompanying drawing I have illustrated a perspective of aportion of one form of furnace made in accordance with my invention.

In coking-furnaces of the type to which my invention belongs it is foundthat the heat does not affect the coal to be coked in a uniform manner.When the greater part of the coking is perfected and it is time todischarge the completed product, there remains always a more or lessconical core of material near the center of the mass which isimperfectly coked, if at all. This core is found near the bottom of thefurnace, with its base upon the furnace-floor. I have found that bymaking the interior space of my coking-chamber narrower at the bottomthan at the top I can 0btain a concentration of heat at the bottom sodistributed as to do away with the uncoked core above described. Mypreferred method of embodying this plan is illustrated in theaccompanyingdrawing. Herelemployacoking space or oven 1 shaped like atruncated wedge, base uppermost. One advantage of this preferredembodiment of my invention lies in the ease with which the coke isdischarged. For this purpose the furnace is provided with openings atboth ends, as shown in dotted lines at 2 in the figure. When the cokingis completed, the material is simply pushed through the wedge from oneopen end out at the other.

The doors for closing in the ends of the oven may be made in any one ofmany ways well known in the art.

The gas for heating is introduced into horizontal passages one over theother by means of successive pipes or burners 3, 4, 5, 6, and 7 on eachside of the furnace. The ignited gas passes through the' top passage,thence into the next lower passage, and so on to the discharging-point.This operation takes place on both sides of the oven, as shown. In orderto maintain the necessary high temperature, new Volumes of burning gasmust be added at intervals in the course of the total circulation, andfor this purpose I have shown the burner for each passage. More or lessthan this may be used, according to circumstances. I have found that thebest results are producible by introducing the gas gradually and makingthe passages successively wider toward the discharge-point for saidgases, as illustrated. This gradual enlargement of the ducts providesroom for the constantly-increasing volume of gas. I prefer to obtainthese results by constructing the sides of the oven of hollow fire-bricksections whose Walls next the coke are inclined in conformity to theincline of the wedge-shaped chamber', while their opposite Walls are atan angle thereto, preferably vertical, as shown. The constructioninvolving the inclined inner faces of the brick passages has thisadvantage, that it adds greatly to the strength of the structure. Wheremorethan three passages are used, l have found thatvertical walls areapt to yield under the weight of the arch over the oven when under theinfluence of the high temperature necessary.

What I claim is- I. In a coke-oven, a coking-space, passages over eachother along the sides thereof and burners at intervals for introducinggas gradually into said passages, said passages being successively ofincreasing cross-section as the outlet is approached.

2. In a coke-oven,- a @cking-space narrowing toward the bottom, passagesover each other along the sides thereof, said passages being ofsuccessivelygreater cross-section downward, and burners for introducinggas into said passages at intervals.

3. In a coke-oven, a coking-space shaped like a truncated wedge baseupward, horizontal fire-brick passages under each other fitted to thesides of said wedge so as to wid en downward in proportion as thecoking-space narrows, and burners for introducing gas into said passagesat intervals.

CHRISTOPHER G. ATWATER.

Witnesses:

ODIN B. ROBERTS, ELEANOR F. GROLL.

IOO

